Shedding light on dark DNA Most textbook definitions of evolution state that it occurs in two stages: mutation followed by natural selection. DNA mutation is a common and continuous process, and occurs completely at random.
The average adult only eats 15 grams of fiber per day. Women need 25 grams of fiber per day, and men need 38 grams per day, according to the Institute of Medicine.
Most people do not get enough fiber each day. In fact, the average american only gets about 15 grams per day. It is clear that learning about how much fiber per day is indeed important and is quite necessary to living a healthy life.